All patients are evaluated for safety and for virologic and immunologic responses at Weeks 4 and 8, then every 8 weeks until the study ends. In addition, all patients have assessments for fat redistribution, fasting lipid profiles, fasting insulin levels, venous lactate levels, and treatment adherence. Patients will be followed for 1.5 to 3 years. Interim safety analyses will be conducted in June 2002 and June 2003. Patients in this study may also enroll in A5125s, a fat distribution and bone mineral density substudy.